• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 추계종합학술대회
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• pp.748-751
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• 2005

본 논문에서는 지상파 DMB(T-DMB)를 텔레매틱스 무선통신 방식으로 활용하기 위한 테스트베드 구축방안을 조사하였다. 텔레매틱스 무선통신 테스트베드는 실내 테스트베드와 실외 테스트베드로 구성된다. 연구 결과로 텔레매틱스 요소기술에 대한 개별 기능 시험을 위한 실내 시험과 실제 도로와 같은 환경에서 주행 중에 행하는 성능 시험 등의 실외 시험을 수행할 수 있는 테스트베드 구축 방안을 도출하였다. 아울러 T-DMB를 텔레매틱스에 활용하기 위해 필요한 양방향성을 지원하기 위한 리턴 채널 구성 방안을 제시하였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 추계종합학술대회 논문집(1)
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• pp.453-456
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• 2000

This paper describes IMT-2000 Testbed System which consists of ATM based IMT-2000 exchange(A-lMX), RNC simulator, HLR simulator, SCP simulator, B-ISDN subscriber simulator and MS simulator. Simulators were developed to verify the mobile functions and basic services of IMT-2000 like Videophone, VoD(Video on Demand), and Internet access. UPT(Universal Personal Telecommunication) service could be adapted well to this testbed system. Until the entire network elements are developed fully, this testbed system can be used to prove new services in IMT-2000 network.

• 품질경영학회지
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• 제49권4호
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• pp.505-525
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• 2021

Purpose: The purpose of this study was to investigate factors influencing the intention to use Fintech Digital Sand(D-Testbed), which facilitate digital innovation in the financial sectors and allow fintech startups to simulate the PoC their innovative ideas before starting a business. Methods: This study used the Extended Technology Acceptance Model (TAM2), with independent variables such as social influence, personal innovativeness, service quality, relative advantage, and security concerns used in previous studies, for analysis. For mediator variables, the perceived usefulness and perceived ease of use were used in this study. Results: The results indicated that social influence and perceived usefulness have a positive effect on the intention to use. It was also analyzed that relative advantage has a mediating effect on perceived usefulness whereas service quality nor personal innovativeness are not statistically significant mediation. On the other hand, perceived ease of use on the intention is not statistically significant. By this, it was confirmed that the intention to use Fintech Digital Sand(D-Testbed) was to improve the business performance of fintech companies, but not because it was easy to learn and take less effort. Conclusion: The finding of the study provides valuable implications for invigorating the use of fintech digital sandbox(D-testbed) and identifying the factors that affect the perception and intention to use among employees in fintech companies in advance.

• 한국항행학회논문지
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• 제12권6호
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• pp.539-547
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• 2008

본 논문에서는 연구용 ADS-B/TIS-B Validation Testbed(AVT)설계를 위한 기초 결과에 대하여 살펴본다. ADS-B는 GNSS와 디지털 데리터링크를 활용한 새로운 항공감시 개념이다. ADS-B는 종속적인 감시 개념이기 때문에 ADS-B송수신기를 장착하지 않은 항공기에 대한 감시 정보는 획득이 불가능하다. 기존의 이차감시레이더를 사용하여 획득한 감시정보를 제공하는 개념이 AIS-B이다. AVT는 ADS-B 및 ATS-B 개념을 기반으로 한 차세대 위성항행시스템의 감시 플랫폼이라는 의의가 있다.

• 디지털융복합연구
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• 제15권7호
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• pp.13-25
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• 2017

국내의 경우 부처별로 다양한 기술개발 사업을 추진해왔고 R&D투자확대 정책에 따라 다양한 분야에서 성과를 내고 있으며 최근 기술개발 단계에서 실증단계로 넘어가면서 개발기술 및 서비스를 실증하기 위한 테스트베드사업을 활발하게 추진하고 있다. 하지만 개별부처에서 경쟁적으로 R&D사업을 계획하고 추진하게 됨에 따라 테스트베드사업의 일관되고 체계적인 시스템이 없다는 지적이 제기되고 있다. 가장 문제시 되는 부분이 테스트사업이 완료가 되었어도 이후의 운영 관리가 미흡하여 개발기술뿐만 아니라 테스트베드 자체도 사장된다는 점이다. 이러한 문제를 해결하기 위하여 국가 R&D 테스트베드사업을 할 시 운영관리, 사업화 방안을 마련하는 연구도 동반되어야 하나 현재까지도 개발기술을 검증하는 테스트베드 구축에 중점을 두어 이후의 체계에 대해서는 고려하지 않는 실정이다. 본 연구에서는 기존 스마트시티 관련 국가 R&D 테스트베드 사업의 문제점을 집중 분석하고, 국내외 운영관리 성공사례를 적극 수용하여 국책사업의 성과 극대화, 효율성, 지속성 등을 해결하기 위하여 기본적인 운영관리 방향을 도출하고자 한다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제27권spc호
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• pp.34-50
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• 2022

Principal component analysis (PCA) was conducted using hydrochemical data in four testbeds (A to D) built for the development of site characterization technologies to assess the hydrochemical processes controlling the hydrochemistry in each site. The PCA results indicated the nitrogen loading to deep bedrock aquifers through permeable fractures in Testbed A, the chemical weathering enhanced with the biodegradation of petroleum hydrocarbons in Testbed B, the reductive dechlorination in Testbed C, and the different hydrochemistry depending on the depth to bedrock in Testbed D, consistent with the characteristics of each site. In Testbeds B and D, outliers seemed to affect the PCA result probably due to the small number of samples, whereas the PCA result was still consistent with site characteristics. This study result indicates that the PCA is widely applicable to hydrochemical data for the assessment of major hydrochemical processes in contamination sites, which is useful for site characterization when combined with other site characterization technologies, e.g., geological survey, geophysical investigation, borehole logging. It is suggested that PCA is applied in contaminated sites to interpret hydrochemical data not only for the distribution of contamination levels but also for the assessment of major hydrochemical processes and contamination sources.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2007년도 하계종합학술대회 논문집
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• pp.171-172
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• 2007

The need for open architecture based IP network is becoming increasingly critical because the electric power industry has begun to upgrade to digital systems. In this paper, we implemented IPv6 testbed and experimented IPv6 performance actually for examination on IPv6 applications to electric power communication network. We achieved preliminary tests relevant to IPv6 to solve expected problems before.

• 제어로봇시스템학회논문지
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• 제10권6호
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• pp.566-573
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• 2004

This paper describes the ubiquitous home network (uHome-net) testbed and LonRF intelligent devices based on LonWorks technology. These devices consist of Neuron Chip, RF transceiver, sensor, and other peripheral components. Using LonRF devices, a home control network can be simplified and most devices can be operated on LonWorks control network. Also, Indoor Positioning System (IPS) that can serve various location based services was implemented in uHome-net. Smart Badge of IPS, that is a special LonRF device, can measure the 3D location of objects in the indoor environment. In the uHome-net testbed, remote control service, cooking help service, wireless remote metering service, baby monitoring service and security ＆ fire prevention service were realized. This research shows the vision of the ubiquitous home network that will be emerged in the near future.

• 한국멀티미디어학회논문지
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• 제25권8호
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• pp.1085-1096
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• 2022

The manufacturing industry is continuously pursuing advanced technology and smartization as it converges with innovative technology. Improvement of manufacturing productivity is achieved by monitoring, analyzing, and controlling the facilities and processes of the manufacturing site in real time through a network. In this paper, we proposed a new OPC-UA based digital twin model for smart factory facilities. A testbed system for USB flash drive packaging facility was implemented based on the proposed digital twin model and OPC-UA data communication scheme. Through OPC-UA based digital twin model, equipment and process status information is transmitted and received from PLC to monitoring and control 3D digital models and physical models in real time. The usefulness of the developed digital twin testbed system was evaluated through usability test.

• 정보통신설비학회논문지
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• 제5권1호
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• pp.43-59
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• 2006

A compact and broadband $4\times1$ array antenna was developed for 3G smart antenna system testbed. The $4\times1$ uniform linear away antenna was designed to operate at 1.885 to 2.2GHz with a total bandwidth of 315MHz. The array elements were based on the novel broadband L-probe fed inverted hybrid E-H (LIEH) shaped microstrip patch, which offers 22% size reduction to the conventional rectangular microstrip patch antenna. For steering the antenna beam, a commercial variable attenuator (KAT1D04SA002), a variable phase shifter (KPH350SC00) with four units each, and the corporate 4-ways Wilkinson power divider which was fabricated in-house were integrated to form the beamforming feed network. The developed antenna has an impedance bandwidth of 17.32% $(VSWR\leq1.5)$, 21.78% $(VSWR\leq2)$ with respect to center frequency 2.02GHz and with an achievable gain of 11.9dBi. The design antenna offer a broadband, compact and mobile solution for a 3G smart antenna testbed to fully characterized the IMT-2000 radio specifications and system performances.